| /* |
| * Copyright 2002-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <string.h> |
| #include <openssl/opensslconf.h> |
| #include <openssl/evp.h> |
| #include <openssl/encoder.h> |
| #include <openssl/decoder.h> |
| #include <openssl/core_names.h> |
| #include <openssl/core_dispatch.h> |
| #include <openssl/params.h> |
| #include <openssl/err.h> |
| #include "apps.h" |
| #include "progs.h" |
| #include "ec_common.h" |
| |
| typedef enum OPTION_choice { |
| OPT_COMMON, |
| OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, |
| OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME, |
| OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE, OPT_CHECK_NAMED, |
| OPT_R_ENUM, OPT_PROV_ENUM |
| } OPTION_CHOICE; |
| |
| const OPTIONS ecparam_options[] = { |
| OPT_SECTION("General"), |
| {"help", OPT_HELP, '-', "Display this summary"}, |
| {"list_curves", OPT_LIST_CURVES, '-', |
| "Prints a list of all curve 'short names'"}, |
| #ifndef OPENSSL_NO_ENGINE |
| {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, |
| #endif |
| |
| {"genkey", OPT_GENKEY, '-', "Generate ec key"}, |
| {"in", OPT_IN, '<', "Input file - default stdin"}, |
| {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"}, |
| {"out", OPT_OUT, '>', "Output file - default stdout"}, |
| {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"}, |
| |
| OPT_SECTION("Output"), |
| {"text", OPT_TEXT, '-', "Print the ec parameters in text form"}, |
| {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"}, |
| {"param_enc", OPT_PARAM_ENC, 's', |
| "Specifies the way the ec parameters are encoded"}, |
| |
| OPT_SECTION("Parameter"), |
| {"check", OPT_CHECK, '-', "Validate the ec parameters"}, |
| {"check_named", OPT_CHECK_NAMED, '-', |
| "Check that named EC curve parameters have not been modified"}, |
| {"no_seed", OPT_NO_SEED, '-', |
| "If 'explicit' parameters are chosen do not use the seed"}, |
| {"name", OPT_NAME, 's', |
| "Use the ec parameters with specified 'short name'"}, |
| {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "}, |
| |
| OPT_R_OPTIONS, |
| OPT_PROV_OPTIONS, |
| {NULL} |
| }; |
| |
| static int list_builtin_curves(BIO *out) |
| { |
| int ret = 0; |
| EC_builtin_curve *curves = NULL; |
| size_t n, crv_len = EC_get_builtin_curves(NULL, 0); |
| |
| curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves"); |
| if (!EC_get_builtin_curves(curves, crv_len)) |
| goto end; |
| |
| for (n = 0; n < crv_len; n++) { |
| const char *comment = curves[n].comment; |
| const char *sname = OBJ_nid2sn(curves[n].nid); |
| |
| if (comment == NULL) |
| comment = "CURVE DESCRIPTION NOT AVAILABLE"; |
| if (sname == NULL) |
| sname = ""; |
| |
| BIO_printf(out, " %-10s: ", sname); |
| BIO_printf(out, "%s\n", comment); |
| } |
| ret = 1; |
| end: |
| OPENSSL_free(curves); |
| return ret; |
| } |
| |
| int ecparam_main(int argc, char **argv) |
| { |
| EVP_PKEY_CTX *gctx_params = NULL, *gctx_key = NULL, *pctx = NULL; |
| EVP_PKEY *params_key = NULL, *key = NULL; |
| OSSL_ENCODER_CTX *ectx_key = NULL, *ectx_params = NULL; |
| OSSL_DECODER_CTX *dctx_params = NULL; |
| ENGINE *e = NULL; |
| BIO *out = NULL; |
| char *curve_name = NULL; |
| char *asn1_encoding = NULL; |
| char *point_format = NULL; |
| char *infile = NULL, *outfile = NULL, *prog; |
| OPTION_CHOICE o; |
| int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0; |
| int ret = 1, private = 0; |
| int no_seed = 0, check = 0, check_named = 0, text = 0, genkey = 0; |
| int list_curves = 0; |
| |
| prog = opt_init(argc, argv, ecparam_options); |
| while ((o = opt_next()) != OPT_EOF) { |
| switch (o) { |
| case OPT_EOF: |
| case OPT_ERR: |
| opthelp: |
| BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| goto end; |
| case OPT_HELP: |
| opt_help(ecparam_options); |
| ret = 0; |
| goto end; |
| case OPT_INFORM: |
| if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat)) |
| goto opthelp; |
| break; |
| case OPT_IN: |
| infile = opt_arg(); |
| break; |
| case OPT_OUTFORM: |
| if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) |
| goto opthelp; |
| break; |
| case OPT_OUT: |
| outfile = opt_arg(); |
| break; |
| case OPT_TEXT: |
| text = 1; |
| break; |
| case OPT_CHECK: |
| check = 1; |
| break; |
| case OPT_CHECK_NAMED: |
| check_named = 1; |
| break; |
| case OPT_LIST_CURVES: |
| list_curves = 1; |
| break; |
| case OPT_NO_SEED: |
| no_seed = 1; |
| break; |
| case OPT_NOOUT: |
| noout = 1; |
| break; |
| case OPT_NAME: |
| curve_name = opt_arg(); |
| break; |
| case OPT_CONV_FORM: |
| point_format = opt_arg(); |
| if (!opt_string(point_format, point_format_options)) |
| goto opthelp; |
| break; |
| case OPT_PARAM_ENC: |
| asn1_encoding = opt_arg(); |
| if (!opt_string(asn1_encoding, asn1_encoding_options)) |
| goto opthelp; |
| break; |
| case OPT_GENKEY: |
| genkey = 1; |
| break; |
| case OPT_R_CASES: |
| if (!opt_rand(o)) |
| goto end; |
| break; |
| case OPT_PROV_CASES: |
| if (!opt_provider(o)) |
| goto end; |
| break; |
| case OPT_ENGINE: |
| e = setup_engine(opt_arg(), 0); |
| break; |
| } |
| } |
| |
| /* No extra args. */ |
| if (!opt_check_rest_arg(NULL)) |
| goto opthelp; |
| |
| if (!app_RAND_load()) |
| goto end; |
| |
| private = genkey ? 1 : 0; |
| |
| out = bio_open_owner(outfile, outformat, private); |
| if (out == NULL) |
| goto end; |
| |
| if (list_curves) { |
| if (list_builtin_curves(out)) |
| ret = 0; |
| goto end; |
| } |
| |
| if (curve_name != NULL) { |
| OSSL_PARAM params[4]; |
| OSSL_PARAM *p = params; |
| |
| if (strcmp(curve_name, "secp192r1") == 0) { |
| BIO_printf(bio_err, |
| "using curve name prime192v1 instead of secp192r1\n"); |
| curve_name = SN_X9_62_prime192v1; |
| } else if (strcmp(curve_name, "secp256r1") == 0) { |
| BIO_printf(bio_err, |
| "using curve name prime256v1 instead of secp256r1\n"); |
| curve_name = SN_X9_62_prime256v1; |
| } |
| *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, |
| curve_name, 0); |
| if (asn1_encoding != NULL) |
| *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING, |
| asn1_encoding, 0); |
| if (point_format != NULL) |
| *p++ = OSSL_PARAM_construct_utf8_string( |
| OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, |
| point_format, 0); |
| *p = OSSL_PARAM_construct_end(); |
| |
| if (strcasecmp(curve_name, "SM2") == 0) |
| gctx_params = EVP_PKEY_CTX_new_from_name(NULL, "sm2", NULL); |
| else |
| gctx_params = EVP_PKEY_CTX_new_from_name(NULL, "ec", NULL); |
| if (gctx_params == NULL |
| || EVP_PKEY_keygen_init(gctx_params) <= 0 |
| || EVP_PKEY_CTX_set_params(gctx_params, params) <= 0 |
| || EVP_PKEY_keygen(gctx_params, ¶ms_key) <= 0) { |
| BIO_printf(bio_err, "unable to generate key\n"); |
| goto end; |
| } |
| } else { |
| params_key = load_keyparams(infile, informat, 1, "EC", "EC parameters"); |
| if (params_key == NULL || !EVP_PKEY_is_a(params_key, "EC")) |
| goto end; |
| if (point_format |
| && !EVP_PKEY_set_utf8_string_param( |
| params_key, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, |
| point_format)) { |
| BIO_printf(bio_err, "unable to set point conversion format\n"); |
| goto end; |
| } |
| |
| if (asn1_encoding != NULL |
| && !EVP_PKEY_set_utf8_string_param( |
| params_key, OSSL_PKEY_PARAM_EC_ENCODING, asn1_encoding)) { |
| BIO_printf(bio_err, "unable to set asn1 encoding format\n"); |
| goto end; |
| } |
| } |
| |
| if (no_seed |
| && !EVP_PKEY_set_octet_string_param(params_key, OSSL_PKEY_PARAM_EC_SEED, |
| NULL, 0)) { |
| BIO_printf(bio_err, "unable to clear seed\n"); |
| goto end; |
| } |
| |
| if (text |
| && !EVP_PKEY_print_params(out, params_key, 0, NULL)) { |
| BIO_printf(bio_err, "unable to print params\n"); |
| goto end; |
| } |
| |
| if (check || check_named) { |
| BIO_printf(bio_err, "checking elliptic curve parameters: "); |
| |
| if (check_named |
| && !EVP_PKEY_set_utf8_string_param(params_key, |
| OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE, |
| OSSL_PKEY_EC_GROUP_CHECK_NAMED)) { |
| BIO_printf(bio_err, "unable to set check_type\n"); |
| goto end; |
| } |
| pctx = EVP_PKEY_CTX_new_from_pkey(NULL, params_key, NULL); |
| if (pctx == NULL || !EVP_PKEY_param_check(pctx)) { |
| BIO_printf(bio_err, "failed\n"); |
| goto end; |
| } |
| BIO_printf(bio_err, "ok\n"); |
| } |
| |
| if (outformat == FORMAT_ASN1 && genkey) |
| noout = 1; |
| |
| if (!noout) { |
| ectx_params = OSSL_ENCODER_CTX_new_for_pkey( |
| params_key, OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS, |
| outformat == FORMAT_ASN1 ? "DER" : "PEM", NULL, NULL); |
| if (!OSSL_ENCODER_to_bio(ectx_params, out)) { |
| BIO_printf(bio_err, "unable to write elliptic curve parameters\n"); |
| goto end; |
| } |
| } |
| |
| if (genkey) { |
| /* |
| * NOTE: EC keygen does not normally need to pass in the param_key |
| * for named curves. This can be achieved using: |
| * gctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL); |
| * EVP_PKEY_keygen_init(gctx); |
| * EVP_PKEY_CTX_set_group_name(gctx, curvename); |
| * EVP_PKEY_keygen(gctx, &key) <= 0) |
| */ |
| gctx_key = EVP_PKEY_CTX_new_from_pkey(NULL, params_key, NULL); |
| if (EVP_PKEY_keygen_init(gctx_key) <= 0 |
| || EVP_PKEY_keygen(gctx_key, &key) <= 0) { |
| BIO_printf(bio_err, "unable to generate key\n"); |
| goto end; |
| } |
| assert(private); |
| ectx_key = OSSL_ENCODER_CTX_new_for_pkey( |
| key, OSSL_KEYMGMT_SELECT_ALL, |
| outformat == FORMAT_ASN1 ? "DER" : "PEM", NULL, NULL); |
| if (!OSSL_ENCODER_to_bio(ectx_key, out)) { |
| BIO_printf(bio_err, "unable to write elliptic " |
| "curve parameters\n"); |
| goto end; |
| } |
| } |
| |
| ret = 0; |
| end: |
| if (ret != 0) |
| ERR_print_errors(bio_err); |
| release_engine(e); |
| EVP_PKEY_free(params_key); |
| EVP_PKEY_free(key); |
| EVP_PKEY_CTX_free(pctx); |
| EVP_PKEY_CTX_free(gctx_params); |
| EVP_PKEY_CTX_free(gctx_key); |
| OSSL_DECODER_CTX_free(dctx_params); |
| OSSL_ENCODER_CTX_free(ectx_params); |
| OSSL_ENCODER_CTX_free(ectx_key); |
| BIO_free_all(out); |
| return ret; |
| } |
